Proton Mail Desktop App Portable ((free)) -

This leaves no trace on the host PC and can be carried anywhere.

: Run the official Proton Mail Bridge on your main PC. Step 4 : Copy the special IMAP settings from the Bridge app. Step 5 : Put those settings into your Portable Thunderbird. proton mail desktop app portable

Using a desktop client (portable or otherwise) offers several privacy advantages over a browser: Decentralization This leaves no trace on the host PC

: Install Thunderbird Portable from the platform's app store. proton mail desktop app portable

If using a USB drive for "portable" access, ensure the drive itself is encrypted. Conclusion

If you can tell me you'll be using, and how much offline access you need , I can help you set up the best secure workflow.